Spatial spreading in a multi-antenna communication system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04L-027/26
H04B-007/02
H04B-007/06
H04L-001/06
H04B-007/04
출원번호
US-0526160
(2012-06-18)
등록번호
US-8903016
(2014-12-02)
발명자
/ 주소
Walton, Jay Rodney
Zheng, Lizhong
Ketchum, John W.
Wallace, Mark S.
Howard, Steven J.
출원인 / 주소
QUALCOMM Incorporated
대리인 / 주소
Morris, Anthony R.
인용정보
피인용 횟수 :
1인용 특허 :
129
초록▼
Spatial spreading is performed in a multi-antenna system to randomize an “effective” channel observed by a receiving entity for each transmitted data symbol block. For a MIMO system, at a transmitting entity, data is processed (e.g., encoded, interleaved, and modulated) to obtain ND data symbol bloc
Spatial spreading is performed in a multi-antenna system to randomize an “effective” channel observed by a receiving entity for each transmitted data symbol block. For a MIMO system, at a transmitting entity, data is processed (e.g., encoded, interleaved, and modulated) to obtain ND data symbol blocks to be transmitted in NM transmission spans, where ND≧1 and NM1. The ND blocks are partitioned into NM data symbol subblocks, one subblock for each transmission span. A steering matrix is selected (e.g., in a deterministic or pseudo-random manner from among a set of L steering matrices, where L1) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols, which are further processed and transmitted via NT transmit antennas in one transmission span. The ND data symbol blocks are thus spatially processed with NM steering matrices and observe an ensemble of channels.
대표청구항▼
1. A method of processing data for transmission in a wireless multiple-input multiple-output (MIMO) communication system, comprising: processing data to obtain at least one block of data symbols;performing spatial processing on the at least one block of data symbols with a plurality of steering matr
1. A method of processing data for transmission in a wireless multiple-input multiple-output (MIMO) communication system, comprising: processing data to obtain at least one block of data symbols;performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; andpartitioning the at least one block of data symbols into a plurality of subblocks of data symbols; andselecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock,wherein the partitioning the at least one block of data symbols comprisespartitioning a single block of data symbols into a plurality of subblocks of data symbols. 2. A method of processing data for transmission in a wireless multiple-input multiple-output (MIMO) communication system, comprising: processing data to obtain at least one block of data symbols;performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; andpartitioning the at least one block of data symbols into a plurality of subblocks of data symbols; andselecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock,wherein the partitioning the at least one block of data symbols comprisespartitioning a plurality of blocks of data symbols into a plurality of subblocks of data symbols. 3. A method of processing data for transmission in a wireless multiple-input multiple-output (MIMO) communication system, comprising: processing data to obtain at least one block of data symbols;performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; andpartitioning the at least one block of data symbols into a plurality of subblocks of data symbols; andselecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock,wherein the partitioning the at least one block of data symbols comprisespartitioning the at least one block of data symbols into a plurality of subblocks of data symbols such that each subblock includes data symbols from each of the at least one block. 4. A method of processing data for transmission in a wireless multiple-input multiple-output (MIMO) communication system, comprising: processing data to obtain at least one block of data symbols;performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; andpartitioning the at least one block of data symbols into a plurality of subblocks of data symbols;selecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock; andtransmitting the plurality of subblocks of spatially processed data symbols in a plurality of transmission spans, one subblock in each transmission span. 5. A method of processing data for transmission in a wireless multiple-input multiple-output (MIMO) communication system, comprising: processing data to obtain at least one block of data symbols;performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; andpartitioning the at least one block of data symbols into a plurality of subblocks of data symbols;selecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock; andtransmitting each subblock of spatially processed data symbols from the plurality of transmit antennas in one symbol period. 6. A method of processing data for transmission in a wireless multiple-input multiple-output (MIMO) communication system, comprising: processing data to obtain at least one block of data symbols;performing spatial processing on the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols for a plurality of transmit antennas, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols; andpartitioning the at least one block of data symbols into a plurality of subblocks of data symbols;selecting a steering matrix for each subblock of data symbols, and wherein the performing spatial processing on the at least one block of data symbols comprises performing spatial processing on each subblock of data symbols with the steering matrix selected for the subblock; andtransmitting each subblock of spatially processed data symbols from the plurality of transmit antennas on a respective group of at least one frequency subband.
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